Beef lasagna is a comforting and satisfying dish that is perfect for feeding a crowd. Brown ground beef with onions and garlic in a skillet. Stir in tomato sauce, diced tomatoes, and Italian seasoning. In a separate bowl, mix ricotta cheese, egg, and grated Parmesan. Layer the beef mixture, lasagna noodles, and cheese mixture in a baking dish. Top with mozzarella cheese and bake until bubbly and golden.
